Best kind of breakup to worst and everything in between (best meaning most respectful)
In person
Over video chat
Over skype/phone call
Over IM
Over text
Over e-mail
Having a friend do it for you
Changing your facebook status to "single"

Girl: That asshole just broke up with me over e-mail!
Friend: Ouch. That's pretty low on the breakup hierarchy.
Girl: Yeah. But at least he didn't just change his fb status to "single."
Friend (checking her fb) WHAT THE FRACK???!!!